File 6168.patch of Package vlc

From a618e31cf209168ae420e95750734a37359969e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois=20Cartegnie?= <fcvlcdev@free.fr>
Date: Sun, 7 Jul 2024 11:14:05 +0200
Subject: [PATCH] mux: avformat: fix avio callbacks signature with ffmpeg 6.1

API signature changes introduced depending on a positive define,
then removed later, making it break prior or post removal...

(adapted from commit 503c04fad9239420be26d67aab4d5f63c53eb4f7)
---
 modules/codec/avcodec/avcommon_compat.h |  3 +++
 modules/demux/avformat/mux.c            | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/modules/codec/avcodec/avcommon_compat.h b/modules/codec/avcodec/avcommon_compat.h
index 9d16b3dc47d9..561ad83f99f9 100644
--- a/modules/codec/avcodec/avcommon_compat.h
+++ b/modules/codec/avcodec/avcommon_compat.h
@@ -77,6 +77,9 @@
 #ifndef  FF_MAX_B_FRAMES
 # define  FF_MAX_B_FRAMES 16 // FIXME: remove this
 #endif
+#ifndef FF_API_AVIO_WRITE_NONCONST // removed in ffmpeg 7
+# define FF_API_AVIO_WRITE_NONCONST (LIBAVFORMAT_VERSION_MAJOR < 61)
+#endif
 
 #endif /* HAVE_LIBAVCODEC_AVCODEC_H */
 
diff --git a/modules/demux/avformat/mux.c b/modules/demux/avformat/mux.c
index 8bf8735885f5..033a87bdaaad 100644
--- a/modules/demux/avformat/mux.c
+++ b/modules/demux/avformat/mux.c
@@ -74,11 +74,20 @@ static int AddStream( sout_mux_t *, sout_input_t * );
 static void DelStream( sout_mux_t *, sout_input_t * );
 static int Mux      ( sout_mux_t * );
 
+#if FF_API_AVIO_WRITE_NONCONST
 static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
+#else
+static int IOWrite( void *opaque, const uint8_t *buf, int buf_size );
+#endif
 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
 #if LIBAVFORMAT_VERSION_CHECK( 57, 7, 0, 40, 100 )
+# if FF_API_AVIO_WRITE_NONCONST
 static int IOWriteTyped(void *opaque, uint8_t *buf, int buf_size,
                               enum AVIODataMarkerType type, int64_t time);
+# else
+int IOWriteTyped(void *opaque, const uint8_t *buf, int buf_size,
+                 enum AVIODataMarkerType type, int64_t time);
+# endif
 #endif
 
 /*****************************************************************************
@@ -411,8 +420,13 @@ static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
 }
 
 #if LIBAVFORMAT_VERSION_CHECK( 57, 7, 0, 40, 100 )
+# if FF_API_AVIO_WRITE_NONCONST
 int IOWriteTyped(void *opaque, uint8_t *buf, int buf_size,
                               enum AVIODataMarkerType type, int64_t time)
+# else
+int IOWriteTyped(void *opaque, const uint8_t *buf, int buf_size,
+                 enum AVIODataMarkerType type, int64_t time)
+# endif
 {
     VLC_UNUSED(time);
 
@@ -512,7 +526,11 @@ static int Control( sout_mux_t *p_mux, int i_query, va_list args )
 /*****************************************************************************
  * I/O wrappers for libavformat
  *****************************************************************************/
+#if FF_API_AVIO_WRITE_NONCONST
 static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
+#else
+static int IOWrite( void *opaque, const uint8_t *buf, int buf_size )
+#endif
 {
     sout_mux_t *p_mux = opaque;
     sout_mux_sys_t *p_sys = p_mux->p_sys;
-- 
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